Steam boiler



D. s. JACOBUS LTM 'MQ STEAM BOILER Filed July 28, 1926 Fig-Z 3Sheets-Sheet 1 INVENTOR ATTORNEYS Sw 2,, mm. D. s. JACOBUS fimfi ii STEAM BOILER Filed July 28', 1926 3 Sheets-Sheet 2 Fig Fig Fig-4 0 0 o oo o%@ o 0 o O 5/... 0 0 0 0 0 2 0 0 0 0 o O o 'o{ 0 0 O O /4 0 o 0 0 0 0jfigo O o o o o o O O o o o o 0 0 0 0 O 121 0 0 0 0 0 O 0 0 0 9 0 0 g .00 0 0 0 O0 0 o o o o 5309 INVENTOR BY jade ATTORNEYS Sept. 2, 1930. D.s. JACOBUS STEAM BOILER Filed Jul 28, 1926 5 Sheets-Sheet s ATTORN EYPatented Sept. 2, 1930 UNITED STATES PATENT OFFICE DAVID S. JACOBUS, FMON'I'CLAIB, NEW JERSEY, ASSIGNOR TO THE BA'BCOOK & WIL- COX COMPANY, OFBAYONNE, NEW JERSEY, A CORPORATION OF NEW JERSEY STEAM BOILERApplication filed July 28,

This invention relates to water tube steam boilers, particularly of theStirling type, in which gases flow acrossthe tubes, and will beunderstood from the description in connection with the accompanyingdrawings, in which Fig. 1 is a vertical section through aboilerillustrating the invention; Fig. 2 is a section along the line 22of Fig. 1; Fig. 3 is a section along the line 33 of Fig. 1;

Fig. 4 is a section along'the line 4-4 of Fig. 1; Fig. 5 is a frontelevation taken along the line 55 of Fi 3; Fig. 6 is a section along theline 6-6 0 Fig. 5, and Fig. 7 is a view corresponding to Fig. 1, butshowing the in- 16 vention as used in'a type of furnace without an arch.

In the drawings, reference character 10 indicates a furnace that may beheated, for example, by means of fuel that is introduced through theburners 11. The lower or mud drum of the boiler is shown at 12, providedwith the usual drain or blow-off pipe 13. Banks of tubes 14, 15 and 16connect the drum 12 to the upper drums 17, 18 and 19,

and the upper drums ma be connected to each other by circulating tu es20, in the usual manner.

As will be seen by referring to Fig. 4 of the drawings, the tubes of anyrow in the bank 39 14 are arranged in pairs, with the spaces betweensome of the tubes in a row somewhat greater than the spaces betweenother tubes of the same row in order to provide ample spaces throughwhich tubes can be replaced.

Three baflles 21, 22 and 23 are disposed entirely across the boilerbehind rows of tubes in the bank 14. The tubes in the bank 14 arearranged in rows and the tubes in successive rows are located directlybehind each other. Each of the baifies 21, 22 and 23 is made insectionswith spaces between the sections, the several sections each bridging aspace between adjacent tubes, and the spaces between the sections beingat least as wide as the spaces between tubes. The sections of 1926.Serial No. 125,354.

the several baflles are arranged so that the spaces 1n one bathe arelocated behind the sections of the baffle in front of it, so that thehot products of combustion passing through the spaces of the severalbaflles will follow sinuous paths' across the bank 14 of tubes.

The tubes in the banks 15 and 16 are arranged in rows with the tubes insuccessive rows staggered with respect to each other. A baflle 25 islocated on the front side of the first row of tubes in the bank 15. Thisbafllc is made up of a number of plate sec tions that are connected tothe tubes 15 by means of the U-shaped straps 26, which pass aroundcertain of the tubes and are bolted to adjacent edges of the sectionsthat make up the baflle. The bafile is provided with openings 27. Theseopenings are preferably elongated in the direction of the tubes, and arearranged in vertical rows, the rows of openings being aligned with thesides of the front row of tubes, as most clearly shown in F i 5, and theopenings of successive rows bemg staggered with respect to each other.

A pipe 30 extends from the steam space of the middle drum 18to the inletheader 31 of a superheater that is located between the banks 14 and 15of tubes. U-tubes 32 e011- nect the inlet header 31 to the outlet header7 33 of the superheater, which outlet header is connected to the steammain, in the usual way. A baffle 34 is located between the banks oftubes 14 and 15, as shown in Fig. 1, to prevent the headers 31 and 33 ofthe superheater from being impinged directly by the hot gases.

It will be seen that the hot gases from the furnace 1O cross the severalbanks of tubes in a single pass, being caused to go in sinuous pathsacross the tubes in the bank 14 because of the openings through thebaffles 21, 22 and 23, and being caused to be practically uniformlydistributed across the first row of tubes in the bank 15 by means of theopenings 90 27 in the bafiie 25, and as the tubes in the banks 15 and 16are staggered, the gases are prevented from channeling or forming lanesbetween the tubes, the gases finally passing out through the outlet 84.The baffles 21, 22 and 23 are shown as terminating somewhat shortof thedrum 17, but may be extended entirely to this drum, if desired. Also,the bafile 25 may terminate short of either the upper or lower drum, ifdesired, and other changes and modifications may be made withoutdeparting from the invention.

In Fig. 7, the invention is shown as used with a furnaee'which does notemploy an arch, thus leaving a large combustion space directly in frontof the front bank of tubes. This form I find to be preferable to use.

By the arrangement of the tubes and bafiles as above described, there isa staggered flow of gas throughout the several banks and the tubes inthe bank contacted by the hottest gases are arranged in such a mannerthat replacement of tubes is facilitated.

I claim:

1. In a water tube steam boiler, upper and lower water chambers, aplurality of banks of water tubes connecting said chambers, a furnace infront of the front bank of tubes, an outlet for spent gases at the rearof the rear bank of tubes, a plurality of baffles in the front bank oftubes, with openings in successive bafiies staggered relatively to eachother, and a bafile on the front side of the next bank of tubes, saidlast-named baflie having staggered openings therethrough.

2. In a water tube steam boiler, upper and lower water chambers, aplurality of banks of water tubes connecting said chambers, a furnace infront of the front bank oftubes,an outlet for spent gases at the rear ofthe rear bank of tubes, a plurality of baillcs in the front bank oftubes, with openings in successive baflles staggered relatively to eachother, and a baflie on the front side of the next bank of tubes, saidlast-named bafile having staggered openings therethrough, the tubes insaid bank also being staggered.

3. In a water tube steam boiler, upper and lower water chambers, aplurality of banks of water tubes connecting said chambers, a furnace infront of the front bank of tubes, an outlet for spent gases at the rearof the rear bank of tubes, a plurality of battles in the front bank oftubes, with openings in successive bafiles staggered relatively to eachother, and a baflle on the front side of the next bank of tubes, saidlast-named baffle having staggered openings therethrough, the tubes insaid bank also being staggered, the openings in adjacent vertical rowsof openings in said baffle being in line with the sides of adjacenttubes in said bank of tubes.

4:. In a water tube steam boiler, a plurality of upper chambers, a lowerwater chamber, a plurality of banks of water tubes each connecting oneof said upper chambers to the lower chamber, a furnace in front of thefront bank of tubes, an outlet for spent gases at the rear of the rearbank of tubes, a plurality of bafiies in the front bank of tubes, withopenings in successive baffles staggered relatively to each other, andstaggered tubes in the other banks of tubes.

5. In a water tube steam boiler, upper and lower water chambers, aplurality of banks of water tubes connecting said chambers, a furnace infront of the front bank of tubes, an outlet for spent gases at the rearof the rear bank of tubes, a plurality of baflies in the front bank oftubes, with openings in successive baffles staggered relatively to eachother, staggered tubes in the other banks of tubes, and a bafile wit-hstaggered openings therethrough in front of one of said staggered banks.

6. In a water tube steam boiler, a plurality of upper chambers, a lowerwater chamber, a plurality of banks of water tubes each connecting oneof said upper chambers to the lower chamber, a furnace in front of thefront bank of tubes, an outlet for spent gases at the rear of the rearbank of tubes, the tubes in one bank being arranged in rows with thetubes behind each other aligned, the tubes in another bank beingarranged in rows with the tubes behind each other in staggered relation,and means to cause hot gases from the furnace to pass in sinuous pathstransversely across the bank of tubes that arearranged behind eachother.

7. In a water tube steam boiler, at least two banks of tubes acrosswhich hot gases pass in succession, the tubes in the first bank withwhich the gases contact being arranged in rows with the tubes in one rowbehind those in the other rows, baffling causing the gases to followsinuous paths through the bank, and the tubes in the other bank or banksbeing arranged in rows with the tubes in each row staggered with respecttothose in adjacent rows to cause the gases to follow sinuous pathsthrough said other bank or banks.

8. In a water tube steam boiler, a plurality of upper chambers, a lowerwater chamber, a plurality of banks of water tubes each connecting oneof said upper chambers to the lower chamber, a furnace in front of thefront bank of tubes, anioutlet for spent gases at the rear of the rearbank of tubes, the tubes in one bank being arranged in rows with thetubes in one row behind those in another row, bafiiing in said bankcausing gases flowing therethrough to follow sinuous paths across thebank, and the tubes in the other banks being arranged in rows with thetubes in each row staggered with respect to the tubes in adjacent rows.

9. In a water tube steam boiler, a plurality of upper chambers, a lowerwater chamber, a plurality of banks of water tubes each connecting oneof said upper chambers to the lower chamber, a furnace in front of thefront bank of tubes, an outlet for spent gases at the rear of the rearbank of tubes, the tubes in the front bank being disposed in rows withthe tubes in one row behind those in another row, battling to cause hotgases from the furnace to flow in sinuous paths across the bank, and thetubes in the other banks being arranged in rows with the tubes in eachrow staggered with respect to those in adjacent rows.

DAVID S. JACOBUS.

